A former classmate of the actress has alleged in Woman’s Day that she is in fact 36 and not 29.

She also claims that the Bridesmaids star was never known as Rebel – going by her name Melanie Elizabeth Bownds instead.

The source told the magazine: “I studied with Rebel at Tara Anglican School for Girls in North Parramatta, Sydney.

“But no-one knew of a Rebel Wilson. Her name is – or was – Melanie Elizabeth Bownds, and she’s 36.”

Rebel previously claimed that Melanie Elizabeth are her middle names and at her school students were called by them rather than first names.

We’ve never heard of that ourselves but you never know what they do in Australia.

The former school pal also hit out at the fact Rebel claims to have been brought up in “the ghetto”

She previously told David Letterman: “I'm from Sydney, the western suburbs which is kind of like the real ghetto area.”

Rebel shrugged off the reports yesterday (Image: FameFlynet)

The classmate has insisted she had a upper middle-class upbringing and the school they went to is one of Sydney’s top schools – costing parents up to $25,000 a year.

Rebel, who is currently starring in Pitch Perfect 2, responded to the claims on Twitter, joking: "OMG I'm actually a 100 year old mermaid formerly known as "CC Chalice" ....thanks shady Australian press for your tall poppy syndrome x"

She added: "Okay but all jokes aside now...my real name is Fat Patricia x"